I've only seen 4GB and 8GB of this player on Ebay. Every other store/site that I've seen it carried only 1GB and it's limited on its SD expansion. Reviews seemed okay for it. I considered it, myself. But I think that the lower half just looks soooo cheap. I would recommend that you expect to get hacked memory and just accept that its a 1GB player with expansion.
If you get it though, let me know how it goes.